I used cin and got TLE in Feb 15th.
Then I test the scanf and got Accepted.
I found it interesting that different C++ get different verdict with cin.
Several times of MS C++ because I found interesting of it TLE on different test.
My Submissions on 932D - Tree with submissions 40405924 (Code is same, Language is different)
MS C++ Time limit exceeded on test 80
GNU C++17 Accepted 1356 ms
GNU C++14 Accepted 1326 ms
GNU C++11 Time limit exceeded on test 81
GNU C++ Accepted 1902 ms
GNU C++17 Diagnostics Time limit exceeded on test 11
MS C++ Time limit exceeded on test 81
MS C++(scanf) Accepted 421 ms
MS C++(Submit on Feb 15th) Time limit exceeded on test 82